| 层次-关系型DBMS的实视图及其增量维护 |
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| 引用本文： | 王元珍,陈懿.层次-关系型DBMS的实视图及其增量维护[J].华中科技大学学报(自然科学版),1999(10). |
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| 作者姓名： | 王元珍 陈懿 |
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| 作者单位： | 华中理工大学计算机科学与技术学院 |
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| 摘 要： | 以对象交换模型作为中间模型，讨论了基于层次关系模型的视图机制，提出了一个增量维护的算法．该算法以统一的ＳＱＬ语句定义，维护混合模型上的视图，并提高地图应用系统的适应性．
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| 关 键 词： | GIS实视图 对象交换模型 层次-关系模型 增量维护 |
Materialized Views for Layer Relation Structured Database and Incremental Maintenance |
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| Wang Yuanzhen Chen YiWang Yuanzhen Prof., College of Computer Sci. & Tech.,HUST,Wuhan ,China..Materialized Views for Layer Relation Structured Database and Incremental Maintenance[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1999(10). |
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| Authors: | Wang Yuanzhen Chen YiWang Yuanzhen Prof College of Computer Sci & Tech HUST Wuhan China |
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| Institution: | Wang Yuanzhen Chen YiWang Yuanzhen Prof., College of Computer Sci. & Tech.,HUST,Wuhan 430074,China. |
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| Abstract: | With the object exchange model (OEM) as the intermediate model, the view mechanism is discussed based on the layer relation model. Incremental maintenance algorithms have been developed for either simple views and materialized views, so that the unified SQL statement definition can be used to give maintenance to the views on a hybrid model, and the adaptability of the application system of a map would be improved. |
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| Keywords: | GIS materialized views object exchange model (OEM) layer relation model incremental maintenance |
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